Can't stack anymore activities in Panel in immersive

Hi!

Thanks for flagging this! We are investigating, and we will get back to you.

Ok. I found myself a solution. So to everyone who wants to stack activities inside a panel in immersive mode just do as follow. 

1. Retrieve the android displayId of the panel you want to use to stack activities:

Didn't find a proper way to do it (especially if you have multiple panels), but a way to do it is to look up for display names starting with "VirtualDevice". If you are using only one panel get the virtual displayId of the panel:

(getSystemService(Context.DISPLAY_SERVICE) as DisplayManager).displays.firstOrNull { it.name.contains("VirtualDevice") }

Then when you need to stack a new activity to the panel add some options to 'startActivity' method:

val options: ActivityOptions = ActivityOptions.makeBasic().setLaunchDisplayId(panelDisplayId)
startActivity(yourIntent, options.toBundle())

By doing so, activities will stack up onto the ones on your panel.

If someone has a better and proper solution, please feel free to add here your solution.

Also, people at Meta you should provide this trick on your documentation. It would help a lot of developer.

Thx.